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Guy A. E. Vandenbosch

Guy A. E. Vandenbosch
KU Leuven | ku leuven · Department of Electrical Engineering (ESAT)

Full Professor

About

795
Publications
122,269
Reads
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11,195
Citations
Additional affiliations
January 2011 - present
Universiti Malaysia Perlis
January 2010 - present
January 2010 - present
The American University in Cairo

Publications

Publications (795)
Preprint
Plasmonic vortex lenses (PVLs), producing vortex modes, known as plasmonic vortices (PVs), in the process of plasmonic spin-orbit coupling, provide a promising platform for the realization of many optical vortex-based applications. Very recently, it has been reported that a single PVL can generate multiple PVs. This work exploits the representation...
Article
A novel and simple low-profile high-gain wideband circularly polarized (CP) slot antenna with low radar cross section (RCS) is presented. The proposed antenna is composed of a traditional linearly polarized (LP) slot antenna and an integrated metasurface-based superstrate. The superstrate consists of a center array with metasurface (MS) unit cells...
Article
Shielding involves much more than just putting a conductive screen in between an emitting source and a susceptible device. Starting from Maxwell's equations, the concept of electromagnetic shielding is formally explained. The physical working mechanisms behind the two basic forms of shielding, electric field and magnetic field shielding, are given,...
Article
The concept of multifunctional reflection-mode gratings that are based on rod-type photonic crystals (PhCs) with [Formula: see text] symmetry is introduced. The specific modal properties lead to the vanishing dependence of the first-negative-order maximum on the angle of incidence and the nearly sinusoidal redistribution of the incident-wave energy...
Conference Paper
The critical relevance of ensuring the excitation's causality in electromagnetic (EM) simulations is exploited by the computation of strictly causal time domain interaction integrals as they occur in the partial element equivalent circuit (PEEC) method. Under the hypothesis of thin, almost zero thickness objects, the presented formulas represent an...
Article
Full-text available
In light of the emergence of nonclassical effects, a paradigm shift in the conventional macroscopic treatment is required to accurately describe the interaction between light and plasmonic structures with deep-nanometer features. Towards this end, several nonlocal response models, supplemented by additional boundary conditions, have been introduced...
Article
Full-text available
Metasurfaces containing arrays of thermally tunable metal-free (double-)split-ring meta-atoms and metal-free grids made of vanadium dioxide (VO $$_2$$ 2 ), a phase-change material can deliver switching between (1) polarization manipulation in transmission mode as well as related asymmetric transmission and (2) other functionalities in the terahertz...
Article
Electromagnetic (EM) skyrmions are an EM analogue of the skyrmions in condensed matter physics, offering new degrees of freedom to structure light and manipulate light–matter interactions and thus promising various groundbreaking applications in optics and photonics. Recently, there is a growing interest in composing EM skyrmions based on different...
Article
Vortex modes carrying Orbital Angular Momentum (OAM) provide an ideal platform for realizing many novel physical effects and applications ranging from classical to quantum regimes. An important approach to generating the vortex modes is the electromagnetic (EM) scattering by scatterers holding high degrees of symmetries. Within this context, a clea...
Article
Molecular fluorescence may strongly be affected by plasmonic environments, especially the ones with deep‐nanometer features, associated with the emergence of nonclassical effects. Such effects are largely investigated by a nonlocal hydrodynamic model with additional boundary conditions, describing the collective motion of the free electron gas in m...
Article
Please consult the pre-print on the institutional repository at https://pure.tudelft.nl/admin/files/120282884/Evaluation_of_Convolution_Integrals_at_Late_times_Revisited.pdf
Article
In this article, symbol diversity is presented for the pulse amplitude modulation PAM-4 encoding scheme. This technique is implemented in order to incorporate electromagnetic resilience in a triple modular redundant communication channel that is subjected to electromagnetic disturbances in reverberant environments. An in-depth numerical study is ca...
Article
Full-text available
In this paper we compare different iterative techniques enhanced by the CBFM, that are used to analyze finite arrays of disjoint antenna elements. These are based on the stationary-type methods (Jacobi, Gauss-Seidel, macro-block Jacobi), the nonstationary GMRES and the hybrid alternating GMRES-Jacobi (AGJ) method which combines these two types. In...
Article
A dual-band dual-polarized massive MIMO antenna array is presented for maritime communications and sensing applications in the 5.1 and 5.9 GHz bands. Passive elements are introduced in the array to achieve a low gain pattern variation in both bands. The optimal element spacing is studied, relying on the impact of mutual coupling and the radiation p...
Article
Full-text available
Abstract This work aims at realizing an antenna with a stable radiation pattern for base station applications. A novel high‐efficiency shared‐aperture triple‐band dipole array antenna configuration is proposed in sub‐6 GHz microcell base stations in environments where bi‐directional radiation patterns are preferred. The radiators of the antenna are...
Article
Full-text available
Optomechanical upconversion Molecules have rich signatures in their spectra at infrared wavelengths and are typically accessed with dedicated spectroscopic instrumentation. Chen et al . and Xomalis et al . report optomechanical frequency upconversion from the mid-infrared to the visible domain using molecular vibrations coupled to a plasmonic nanoc...
Article
Full-text available
A resonant frequency control method for dielectric rod resonators is discussed. A dielectric rod of cylindrical shape is placed inside a metal cavity. The bottom face of the dielectric rod is fixed at the metal base plate. Resonant frequency tuning is achieved by lifting the top metal plate above the dielectric rod upper face. The paper presents si...
Article
A simple design of a triple-band multi-polarization reflective polarization converter is presented. The proposed device consists of a modified split-ring structure and a cut-wire resonator. A linearly polarized (LP) incident electromagnetic (EM) wave can be reflected into an orthogonally directed LP wave in two widebands and a circularly polarized...
Preprint
Electromagnetic (EM) skyrmions are an EM analogue of the skyrmions in condensed matter physics, which offer new degrees of freedom to structure light and manipulate light matter interactions and thus promise various groundbreaking applications in optics and photonics. Recently, there is a growing interest in composing EM skyrmions based on differen...
Article
This article describes a novel technique for removing the influence of a continuous wave (or narrowband) electromagnetic disturbance in orthogonal frequency division multiplexing (OFDM) systems with quadrature amplitude modulation or phase-shift keying modulation schemes. The technique relies on a mathematical derivation of how a continuous wave el...
Article
A novel miniature THz resonator consisting of a finite-length slotted graphene cylinder wrapped around an infinite circular dielectric rod is proposed. A full-wave 3D electromagnetic scattering model is built using the method of moments (MoM) solution of the electric-field integral equation (EFIE) in the spectral domain. In order to gain better und...
Preprint
Full-text available
The concept of multifunctional reflection-mode gratings based on rod-type photonic crystals with C2 symmetry is introduced and examined. The specific modal properties lead to the vanishing dependence of the first-negative-order maximum on the angle of incidence within a wide range, and the nearly sinusoidal redistribution of the incident-wave energ...
Article
A novel strategy is proposed to design microstrip antenna arrays with two wide bands for high frequency applications using any-layer HDI PCB technology. This technology makes it possible to stack multiple layers of substrates and micro-vias. Several antennas are designed and taped out to illustrate the new procedure. The antennas cover two wide fre...
Article
Full-text available
This paper presents a technique to design strongly coupled planar arrays with very high aperture efficiency. The key innovation is that, based on an irregular 2 × 1 array, very compact medium-sized arrays of size 2 × 2, 2 × 4, and 2 × 6 are constructed with very strong and constructive mutual coupling between the elements. In this way, a maximum ap...
Article
Full-text available
A novel wearable button antenna sensor is proposed for the concept of simultaneous wireless information and power transfer (SWIPT). This integrates two working modes for the transfer of power and information, respectively, and optimizes transfer efficiency. An omni-directional radiation pattern is achieved in the 3.5 GHz World Interoperability for...
Article
Full-text available
The design of a compact, wideband flexible monopole antenna printed on a flexible Kapton polyimide substrate is presented. The proposed antenna consists of two rhombic elements embedded within a square plane as the radiating element. The wide bandwidth is aimed at alleviating potential performance degradations due to its application in an on‐body e...
Article
Full-text available
Characteristic modes (CM) can be used to solve many radiation and scattering problems involving fully conducting structures. The basic concept is to use eigenvalues and eigenvectors of the characteristic mode equations of a certain topology, and to use these eigenmode currents to control the radiating structure’s behavior. This is accomplished by u...
Preprint
Full-text available
Coherent interconversion of signals between optical and mechanical domains is enabled by optomechanical interactions. Extreme light-matter coupling produced by confining light to nanoscale mode volumes can then access single mid-infrared (MIR) photon sensitivity. Here we utilise the infrared absorption and Raman activity of molecular vibrations in...
Article
This article presents a compact integrated receiver front-end for phased-arrays at 5G n257/n261 band (26.5-29.5 GHz) employing both a low-noise amplifier (LNA) and a novel passive phase-shifter based on variable-phase all-pass networks. The proposed phase-shifter topology is analysed and designed using 0.25 μm BiCMOS achieving continuous tuning cap...
Article
A low-profile wideband microstrip antenna is proposed based on the structure of composite right/left-handed transmission lines (CRLH TLs). The dimensions of the proposed antenna are 64 × 64 × 4 mm. The impedance matching bandwidth is 5.05–5.92 GHz (16.5%). The unit cell of the CRLH TLs is a mushroom structure. Several different resonant modes with...
Article
Full-text available
A new type of wave guiding structure is proposed is this paper. The guiding channel is developed on the full planar dielectric substrate and aligned with electromagnetic bandgap (EBG) units. Since the bandgap of these mushroom-like units is calculated with a coverage of the channel working band, these units are of great importance on ensuring the t...
Conference Paper
Full-text available
Pulsed electromagnetic (EM) scattering from a relatively narrow superconducting strip is analyzed with the aid of the EM reciprocity theorem and the Cagniard-DeHoop (CdH) technique. The analysis yields a stable convolution-type equation that is solved using the marching-on-in-time (MOT) technique for coefficients representing the time-domain (TD) e...
Article
The accurate calculation of the far-field of a large reflector antenna based on the set of discrete reflector points resulting from a structural analysis of the antenna is one of the key problems in the integrated structural-electromagnetic optimization of such antennas. In this study, the classical method that extends the discrete set of points in...
Article
An omni-directional circularly polarized wearable antenna for 5 GHz applications is proposed. The antenna is constructed on a button like setup, using the concept of a magnetic dipole combined with a flexible patch located on a textile substrate to optimize the antenna performance. With the proposed topology, an omni-directional pattern involving a...
Article
The processor industry has been facing challenges for a number of years. This is due to both technical challenges and changing market conditions. The outcome of these challenges was energy-efficient, multi-core processors. This article examines the energy efficiency of several generations of Intel and ARM processors and investigates how architectur...
Article
This paper describes a detailed test setup and procedure to characterize the robustness of Wi-Fi3 and Bluetooth 4.2 against continuous wave electromagnetic disturbances inside a reverberation chamber. Bluetooth 4.2 robustness was also characterized by continuous broadband noise. These experiments aim to reveal the susceptibility of commonly used wi...
Article
Full-text available
This work presents the design and optimization of an antenna with defected ground structure (DGS) using characteristic mode analysis (CMA) to enhance bandwidth. This DGS is integrated with a rectangular patch with circular meandered rings (RPCMR) in a wearable format fully using textiles for wireless body area network (WBAN) application. For this i...
Conference Paper
In this paper we discuss the condition assessment definitions previously used to analyze the effectiveness of EMI detectors/correctors. It is shown that those definitions do not resemble the correct condition and an expansion is needed. New expanded condition assessment definitions are presented and evaluated in comparison with the old ones for a t...
Conference Paper
Full-text available
In this paper, time diversity is used as an EM resilience technique in a Triple Modular Redundant (TMR) communication channel that is subjected to a multi-harmonic electromagnetic disturbance under reverberation conditions. The study shows that time diversity proves to be quite an effective measure in order to incorporate fault tolerance in the sys...
Article
The aim of this study is to compare the typical peak ElectroMagnetic (EM) exposures from smart phones during data transmission and voice calls, respectively, in the typical Western-European city of Leuven, Belgium. Since transmission powers towards the outdoor network in an indoor environment are expected to be higher than in an outdoor environment...
Article
Closed-form time-domain (TD) analytical expressions describing the electromagnetic (EM) signal transfer between two vertical dipoles through a thin, highly contrasting layer with combined magneto-dielectric properties are derived via the Cagniard–DeHoop (CdH) technique with the TD saltus-type conditions. The TD EM-field coupling between the antenna...
Article
In order to model the interaction between light and plasmonic structures at deep-nanometer scale, which is governed by non-classical effects, a nonlocal hydrodynamic approach has been extensively studied. Several hydrodynamic models have been proposed, solving the coupled equations: the linearized hydrodynamic equation of motion and the electrodyna...
Article
A novel 2-D composite right/left-handed transmission line (CRLH-TL) metamaterial in polar coordinates is proposed for the first time, and applied to a multistandard antenna. The prototype antenna with triband operation and colocated pattern and polarization diversity is specifically designed to eliminate the need for multiple antennas in the proces...
Chapter
This chapter presents different techniques to characterize material under test (MUT) in terms of dielectric properties and moisture content also discussed. The chapter shows that different types of antennas and techniques have unique properties to characterize the different forms of MUTs such as solid, semi-solid (powder), and liquid. This chapter...
Chapter
This chapter focuses on the development of various new compact wearable antennas suitable for communications, IOT, medical systems and localization applications. To ensure that these antennas are able to operate with minimal detuning caused by the human body, they have been designed based on three principles: the antennas are first of all compact,...
Conference Paper
This paper proposes a design of an EMI detector, based on an inverted data pair, for the detection of unwanted electromagnetic disturbances on a wired communication channel with the aim to reduce the overall safety risks related to bit errors on such a communication channel. The EMI detector can detect unwanted electromagnetic (EM) disturbances and...
Conference Paper
The goal of this paper is to implement the design of a previously proposed inverted-pair EMI detector using a Monte-Carlo based simulation framework. The inverted-pair EMI detector can detect electromagnetic disturbances in a wired communication channel and generate a warning to the processing unit. The warning generated by the detector helps the s...
Conference Paper
This paper describes an intial study of the suscepti-bility to EMI of the wireless technologies which are or will be used in Intelligent Transportation Systems (ITS). In recent literature reliability comparisons between the two newest Radio Access Technologies (RATs) IEEE802.11bd and NR V2X are starting to appear. Yet none of them consider single/m...
Article
Full-text available
The effect of using a non‐uniform reactive impedance surface (RIS) on the circular polarisation performance of a planar antenna is investigated. It is shown that a very wide axial ratio (AR) bandwidth can be obtained, especially when the RIS is combined with parasitic strips. This result is only possible, thanks to the fact that the RIS is non‐unif...